Advanced Steel Construction

Vol. 9, No. 2, pp. 90-107 (2013)


STUDY ON BEHAVIOR OF CONCRETE FILLED ELLIPTICAL STEEL TUBE MEMBERS PART I: SHORT AND LONG COLUMNS UNDER AXIAL COMPRESSION

 

Xiaoxiong Zha 1, *, Guobin Gong 2 and Xichao Liu 2

1 Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China

2 Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China

*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)

 

Received: 21 September 2011; Revised: 18 January 2012; Accepted: 27 January 2012

DOI:10.18057/IJASC.2013.9.2.1

 

ABSTRACT:

This paper presents theoretical analysis of concrete filled elliptical steel tube (CFEST) members under axial compression. The theoretical analysis presents the distribution rule of interaction between steel tube and core concrete for CFEST column, which is verified and compared with both experimental tests and finite element (FE) simulations. The assumption of effective confined zone distribution of core concrete is proposed and the influence of cross-section shape on the confinement effect is analyzed. A unified axial compressive strength formula and stability factor are obtained for CFEST columns based on existing formulas for concrete filled circular steel tube (CFCST) columns.

 

Keywords:Theoretical analysis, Interaction, Concrete filled elliptical steel tube, Axially compressive strength, Stability factor

 

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